Sectional concrete culvert.



L. CHAPMAN.

SECTIONAL CONCREIE CULVERT.

APPLICATION FILED MAY 75, 1915.

Patented June 6, 1916.

2 SHEETS-SHEET 1.

THE COLUMBIA PLANOGRAPH :0 WASHINGTON, D c.

L. CHAPMAN.

SECTIONAL CONCRETE CULVERTY.

7 APPLICATION FILED MAY 25. 1915.

Patented Jun 6, 1916.

2 SHEETSSHEET 2.

LUKE CHAPMAN, OF RED LODGE, MONTANA.

SECTIONAL CONCRETE CULVERT,

Specification of Letters Patent.

Patented J tine-6, 1916.

Application filed May 25, 1915. Serial No. 30,449.

To all whom it may concern Be it known that I, LUKE CHAPMAN, a citizen of the United States of America, residing at Red Lodge, in the county of Carbon and State of Montana, have invented certain new and useful Improvements in Sectional Concrete Culverts, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to concrete culverts and has for its object the production of a simple and efficient culvert comprising aplurality of sections which are adapted to interlock in such a manner as to constitute a very simple and efficient joint between the several sections.

Another object of this invention is the production of a simple and eflicient means for holding the several sections in an assembled position. I

With these and other objects in view this invention consists of certain novel combinations, constructions and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings :Figure l is a side elevation of the culvert. Fig. 2 is a top plan view thereof. Fig. 3 is a section taken on line 33 of Fig. 1. Fig. 4 is a central longitudinal section through the culvert. Fig. 5 is an end view of the culvert. Fig. 6 is a detailed perspective of one of the sections of the culvert. Fig. 7 is a detailed perspective looking at the opposite end to the section shown in Fig. 6. Fig. 8 is a detailed perspective of one of the locking pins used in holding the sections of the culvert in an assembled position.

Referring to the accompanying drawings by numerals it will be seen thatthe culvert comprises a pair of end sections 1 and a plurality of intermediate sections 2. Each of the end sections 1 is provided with a projecting flange 3 upon the top and sides thereof and one of these sections 1 is provided with a laterally projecting body portion 4 having a socket 5 formed upon the inner face thereof as clearly illustrated in Fig. 4 of the drawings. This socket 5 is adapted to receive the projecting collar 6 of one of the intermediate sections 2 and this collar 6 is preferably formed circular in cross section. A pin 7 passes through the body portion 1 and through the collar 6 as illustrated in Fig. 4 for constituting a simple and efiicient means upon the top of the culvert for holding the sections of 7 the opposite end of each intermediate sec-- tion 2 is provided with a circular pocket 11 for the purpose of permitting the collar 6 of the adjacent section'to snugly fit therein and produce a continuous bore 12 of uniform size throughout the entire length of the culvert. As above described, each of the sections are locked firmly together by means of the pins 7 and 8.

It is preferable to form the culvert of cement or other plastic material although of course any suitable material may be employed, without departing from the spirit of the invention.

Owing to the construction of the intermediate sections 2, it will be seen thatthe opposite end section 1 to that just described, is necessarily provided with a projecting tongue 13 for fitting in the adjacent pocket 11 of the adjoining intermediate section 2. It should also be understood that the pins 7 are preferably provided with beveled heads 14 for permitting the pins to fit in a countersunk position within the culvert sections and prevent the same from coming into contact with foreign objects which would tend to loosen the pins within the culvert sections.

From the foregoing description it will be seen that a very simple and efficient culvert construction has been produced, employing a plurality of similarly constructed intermediate sections 2 which may be employed so as to construct a culvert of any desired or suitable length and also permit the culvert to be repaired at any point desired by the removal of one of these sections and substituting a new section therefor.

What I claim 1s: As a new article of manufacture, a culvert comprising a plurality of similarly con structed plastic sections, each section provided with a circular projectingcollar upon one end thereof and provided with a c1rcular socket formed in the opposite end thereof, the collar portion of one section being adapted to fit snugly within the pocket of the adjacent section, said collar provided with apertures formed therein and eXtend ing transversely therethrough, said sections provided with apertures communicating with said sockets and adapted to register with the apertures formed in said collars 1O retaining pins passing through said apersignature.

LUKE CHAPMAN;

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eaten, Washington, D. C. 

